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internet explorer jumps on update (rowedit) in extjs 4.1

internet explorer jumps on update (rowedit) in extjs 4.1

On my grid i'm using rowediting.if using Internet explorer 9( probably the other versions too ) and the page has scrollbarsWhen i edit a row and click "update" the page scrolls up to the start of the grid.

To recreate the issue.
1) open in internet explorer
2) minimise the so scroll bars appear on the main page.
3) edit / update an item.
4) the page will jump.

I've tried with and without the following in the config. It has no effect.